Stapling machine



May 26, 1925. 1,539,506 F. POLZER STAPLING MACHINE Filed Sept. 25, 1924 6 Hot a Patented May 26, 1925.

PIA-TE NT? or s ICE.

FRIDOLIN POLZER, or NoRwALK, QQNNECTICUT, Ass stin To THE E H. noatcn'ii'zss COMPANY, or NORWALK,.CONNECTICUT, A coneone'rronor oonnnc'rrcnrf s'rArLING MACHINE To all whom it 9726;;1/007706Wt.

Be it known that I, FRIDOLIN PoLznn, a citizen-of the United States, residing at Norwalk, county of Fairfield, State of'Connectiout, have invented a new and useful Stapling Machine, of which the following is a specification. v

This invention, relates to automatic stapling machines of the type in which a strip of previously formed staples connected together are fed I forwardly: with i a step. by; step movement into a position where the individ: ual staples may becut from the strip, driven and clinched by: movable plunger, and has for an object to provide a machine t this character which may be used for driving either long or short staples, and which-when used for driving the short staples may be operated directlywitha blow of the hand, as

in the ordinary: stapling machines, but which i is provided with a lever which may be used for driving tlielonger staples, thus giving greater power for the driving operation where it is desired to staple a large number of sheets of paper together.

lVith the foregoing and other objects. in view, I have devised the construction illustrated in the accompanying drawing forming a part of this specification, similar reference characters being employed throughout the various figures to indicate corresponding elements. In this drawing,

Fig. 1 is a partial side elevation and partial longitudinal vertical section of the device.

Fig. 2 is a top plan view thereof.

Fig. 3 is a partial end elevation looking from the right of Fig; 1' and partial section substantially on line'3.3 of Fig. 1.

Fig. at is a vertical longitudinal section through the housing;

Fig. 5 is a detail section substantially on line 55-of Fig. 4L, and

Fig. 6 is a rear elevation of the lower part of the machine looking from the left of F ig. 1. I

in the embodiment illustrated the machine comprises a base 10 having an upwardly ex tending lug 11 carrying the anvil 12' which has the usual recesses in the top surface thereof for clinching the staples. This anvil is a steel plate remov abb mounted on the lug 11 by suitable screws 13. At the rear end of thebase is'another upwardly extending lug 1% which is embraced by the forked tially' U-shaped. in cross section so that it lower end 15 of; a bracket 16 and to which the bracket is secured bysuitable pins li, this bracket being curved forwardly as shown inFig. 1, and preferably substanis open at ltS'fOlEWEtlCliSlClQ. a

The upper portion 18 o f the 'lug ld. is somewhat narrower than thelower portion, as shown in Fig. 6, and is-embraced by the projections 19 on the rear end pf the v lions-- ing 20, and the housing is pivoted to-this lug by a pinQl eXten tling'throughtheseprojections and the lug i any desired shape, but is reterably suh stantially that of the standard type (itstapling machines of this character, and it-[encloses the staple strip guiding-and holding means, the feeding meansand the staple The housing maybe of severing and. clinching mechanism. .The'

staple guiding and supporting means. comprises the usual slide 22 mounted in thelower part ot the housing by pins or screws 23. The upper part of this slide, is usual, isof slightly less width than the distance between the prongs of the staples 24; onthe'staplestrip supported by thisguide, and at its low-' or portion is somewhat wider or has spacing strips 25 to. provide clearance for the staple prongs between the slide and thehousing.

The usual holdback 26 ispivotedin thehousf 'ing zit-27 and is heldagainst the top o f the staple strip by a spring 28, thisholdback preventing backward movement of the strip during the backward movement of the feed pawl29. The feed pawl is pivoted to a cam plate 30 pivoted in the housing at 31, and the pawl is normally held in engagementlwith the top of the staple strip by a spring 32, and the cam plate is swung about its pivot to advance the pawl and the staple strip means of a spring 33, H V v The forward portion of the'housingis provided with the usual guides 34 'for a' vertically moving plunger the .lower endg fi of this plunger being arrangedto coact with the forward end of theslide 22 to. sever ;the individual staples from the strip,'to then drive the prongs of'the staples through the articlesv indicated at 37 150 beconnected. and

then, in conjunctionwith the anvihto clinch the staples. At the rear side'ot' the plunger a cam lu 38 is'arranged to ien a 'e the cam 39 b in t 0 when the plunger is forced downwardly, to

rock the feed plate on its, pivot and move the staple on the strip preparatory to the next feeding operation when the plunger moves upwardly. A cross pin 40 is in the path of the. movement otthislug 38 and limits th upward movement of the plunger.

Closely adjacentthe plunger and tethe rear thereof is a, plate 41 havingdownwardly-extending fingers 42 on opposite sides of'the lug 38 arranged to passbetw'een the prongs of the first and second staples on the strip to straighten these staples should they'be' bent out of the vertical position,

and will also hold the first or-toremost staple on the' 'strip to prevent'its turning backwardly during the operation ofsevering this staple from the strip. This plate is movable with the plungerlthi'oughout aportion of its movement, butafter the lower ends of the fingers 42 engage the top of the lyffheld against lateral ;movement.

articles 37 this plate'has'no further movement'al'though the plunger may advance further to clinch the staples.

of the plateis controlled by meansofcoil,

This movement spring 43 and 44 which embrace the pro- 'jeeting portion of the plunger'above the housing, and the lower spring 43' also embraces this plate. At its upper end'the plate is provided with flanges 46 engaging the 0p: posite sides otthe plunger whereby thefplate is guided byfthe plunger, and above these:

flanges is provided with-outwardly and upwardly extending fingers 47. The upper end of the spring 43 rests against the'under sides ofthese fingers'so as to raise the-plate and the fingers 42 and also the plunger. A

that. it may slide on the plunger but is rigid- This disc is provided 'withnotches 49 in which the fingers 47'0f the'plate 41. project, and

this disc, therefore, prevents the plate 41 moving laterally away from the plunger should 1t meet with a too great resistance against the staples during its downward Jm'ovement. In other words, the washer retains the plate 41 in its proper position relax tive to the plunger, The upper spring 44 jthe'upper end of the plunger.

rests against the top of the disc and the under side of thecap or head 50 secured to The upper spring- 44 is somewhat stiffer and stronger than the lowerspring 43 so that as the plun ger'is'forceddownwardly the lower spring vwill be compressed and the upper spring will force the plate 41 downwardly to insert the fingers 42 between the prongs of the staples. When the staple straightening de 'vice're'aches its lowest position, as when the lower ends of the fingers 42 engage the top" ofthe articles to be connected, the spring 44 will thenallow the plunger to complete .itsmovement' to clinch the staples.

APivoted inthe upper portion of the bracks et 16 is anoperat-ing lever 51, th'e pivot being shown M 52, and this lever is normally. in a substantially horizontal position, as

shown in'ifull lines Fig.1, over the'top of the "plunger. This lever is; also. preferably substantially U-shape'i'n cross sectionto give it the required strength and also so that it'.

will be open atits lowers'ide.

rounded so'that it will be comfortable to the hand of the operator k Mounted within this lever betweenthe handle and pivot is roller 53 which willrun on thetop surface of the headwhen the lever-is-depressed, and

it is preferablyso arranged that the center line of 3 this roller is. substantially :onthe vertical 'centerline of the plunger at the time when the lower end of -the' plunger engages the foremost staple on 1 the strip to sever this staple from the stripfl Thisiiis the position shown in dotted-li nes Fig. 4-and is the time'whenthere is the greatest resistance to the movenient'of thefplunger, and

by arranging the elements thus there is .no

'1 p The upper s1de' ofthe hand-leportion of this lever is means'for'engaging the-headeO of the plunger 35 for operating this plunger. This means preferably comprisesan anti-friction;

"lateral strainon-the plunger when it is in the positionof greatest resistance; A spring 54'isenclosed-bythe bracket '16 and is COD.

. ine'cted' at its opposite ends to this bracket and the lever' el and tends to hold theweight of this lever off the top of'the plunger so that the spring 43' does not have to raisethis lever after the clinching operation, but merely isfre'quired toraise-the. plunger as inthe usual typeof stapling machines. A

screw 55 or other suitable holdingdevice is mountedin one sideof-the lever. 51, and. is

arranged to. engage under the head 50 011 the plunger so that by raising the handle of j the lever, as shown in dotted lines Fig.1, this screw or catch will also raise theforward end of the himsing 20 aboutiits pivot 21 away from the anvil and allow insertion of the articles 37 whioh'are'to be stapled.

This upward movement is limited by a stop pin '56 carried-by the bracket in position to be engaged'by the upper wallof the housing.

In stapling 'a large-number of articles together, as for instance a large numberof sheets of paper, l.considerable,'force is required to force the prongsoi the staple through these articles, and it will heapparent that this lever. as sliownwill give the required power for easily forcing the prongs through the articles, but-as a large part of the workof machines of this type is to staple a small number of sheets at a time the lever 5 51 may be moved toan'inefi'ect ve position to allow d rect manual operation of the plan ger witha blowof the hand on the header cap 50. Th-is is accomplishedby retracting the-screw 55 so. that itwill no lon er eiwa e underthe head 50, thenlever iii) may be raised to the dot and dash position 51, Fig. 1, to expose the head of the plunger. The lever will be held in this position by the spring 54.

It will be apparent from the above description that the lever 51 provides simple and powerful means for clinching the staples so that a large number of articles, as sheets of paper, may be easily stapled, and that this lever also provides convenient means for lifting the housing carrying the stapling mechanism from the anvil to allow placing the articles in the stapling position. Furthermore, that by a simple operation the lever may be moved to an ineffective position to allow direct manual operation of the plunger in the stapling of a small number of sheets, if desired. The staple strip is inserted in the machine onto the slide 22 through the opening 57 at the lower part of the bracket 16.

Having thus set forth the nature of my invention, what I claim is:

1. In a stapling machine, a base, an anvil mounted on the base, a pivoted housing, a plunger mounted in the housing and adapted to coact with said anvil toset the staples, a pivoted lever, a connection between the lever and said plunger for operating the latter, and a connection between the lever and housing for lifting the latter to permit insertion of articles to be connected between the housing and anvil, said lever being movable to an ineffective position to permit direct operation of the plunger.

In a stapling machine, a base, a pivoted lev r, a pivoted housing, a plunger mounted for up and down movement in the housing for clinching the staples, a head on said plunger shaped for direct manual operation thereof by a blow of the hand, means for limiting the upward movement of the plunger, and an easily releasable connection between the lever and plunger to operate the plunger and lift the housing, thereby permitting the connection to be readily released to allow removal of the lever to an ineffective position and permit direct manual operation of the plunger.

3. In a strip staple machine, a base, a housing pivoted to the base, a movable plunger mounted in the housing for severing and driving the individual staples and provided with a head for direct manual operation of the plunger, a bracket extending upwardly from the base, a lever pivoted to the bracket, a roller carried by the lever engaging said head to operate the plunger, means in the housing to limit the upward movement of the plunger, and de-- tachable means'carried by the lever to engage under the head and lift the housing.

tJIn a strip staple machine comprising a housing, means in the housing for feeding and guiding the staple strip, a vertically movable plunger for severing and driving the individual staples, a, slidable element at one side of the plunger and movable throughout part of its movement therewithto pass between the first and second staple on the strip to hold the first staple during the severing operation, and means embracing the plunger and slidable element to prevent separation of the-latter from the plunger. v

5. In a strip staple machine comprising a housing, means in the housing for feeding and guiding the staple strip, a vertically movable plunger for severing and driving the individual staples, a slidable ele-.

ment at one side of the plunger and movable throughout part of its movement therewith to pass between the first and second staple on the strip to hold the first staple during the severing operation, and a disc embracing the plunger and having recesses for passage of a portion of said slidable element to prevent lateral separation thereof from the plunger.

6. In astrip staple machine comprising a housing, means in the housing for feeding and guiding the staple strip, a vertically movable plunger for severing and driv ing the individual staples, a head at the top of the plunger for operating the same, a slidable element at one side of the plunger and movable throughout part of its' movement therewith to pass between two ad-e jacent staples on the strip, said element being provided with upwardly extending fingers at its upper end, a disc embracing the plunger and provided with recesses to receive said fingers, a spring embracing the plunger betweenthe disc and said head, and a spring embracing the plunger between said fingers and the housing.

7. In a stapling machine a base, a pivoted lever substantially U-shaped in cross section, a movable housing, a plunger mounted for movement in the housing for clinching the staples, a head on the plunger extending between the sides of the lever, means carried by the lever engaging the head for operating the plunger,-and means carried by the lever engaging under the head for lifting the plunger and housing.

In testimony whereof I affix my signature.

FRIDOLIN POLZ ER. 

